Skype is an audio and video solutions provider developed by Skype Technologies. It combines peer-to-peer technology with a centralized cloud computing service. It offers VoIP, instant messaging, and file-sharing capabilities. The telecommunications application is compatible with Android 4.0.3 or higher as well as iOS, Windows, and macOS devices. On top of Skype-to-Skype calls, you can also use this to call mobile and landline numbers. Skype is tied-in with other Microsoft applications such as Outlook, OneDrive, Xbox Live so you can immediately log-in the app with your Microsoft account.